-If you have any questions, I will be pleased to answer them at the end of the presentation.-there will be time at the end of the presentation to answer your questions-so please feel free to ask me anything then.-Dont hesitate to interrupt if you have a question.-Please feel free to interrupt me at any time.-Please stop me if you have any questions.-If you need clarification on any point, youre welcome to ask questions at any time.-Can I come back to that point later?-I will be coming to that point in a minute.-Thats a tricky question.-We will go into details later. But just to give you an idea of...-I am afraid theres no easy answer to that one...-Yes, thats a very good point.-Perhaps we could leave that point until the questions at the end of the presentation-I think I said that I would answer questions at the end of the presentation---perhaps you wouldnt mind waiting until then.-I think we have time for just one more question
